The scholarly literature on Apollonius is of rather modest dimensions if one compares it with the amount of work dedicated to other ancients of his calibre—in all (depending on how inclusive the count is), there exist just about six hundred items at the moment. Needless to say, the situation is rapidly changing. It seemed therefore best to divide the Bibliography in two parts, with the 1940s as a natural dividing line, for after World War II Apollonius first had to be rediscovered. (In fact, only one author—Andreas Thierfelder—figures in both parts of the Bibliography.)